• 拖拽——拖动进度条显示进度


    拖动进度条代码

    <!doctype html>
    <html>
    <head>
       <script src="http://libs.baidu.com/jquery/1.11.1/jquery.min.js"></script>
        <script type="text/javascript">
            $(document).ready(function (e) {
                //设置最大值
                ScrollBar.maxValue = 30;
                //初始化
                ScrollBar.Initialize();
            });
            var ScrollBar = {
                value: 10,
                maxValue: 30,
                step: 1,
                currentX: 0,
                Initialize: function () {
                    if (this.value > this.maxValue) {
                        alert("给定当前值大于了最大值");
                        return;
                    }
                    this.GetValue();
                    $("#scroll_Track").css("width", this.currentX + 2 + "px");
                    $("#scroll_Thumb").css("margin-left", this.currentX + "px");
                    this.Value();
                    $("#scrollBarTxt").html(ScrollBar.value + "/" + ScrollBar.maxValue);
                },
                Value: function () {
                    var valite = false;
                    var currentValue;
                   
                    $("#scrollBar").mousedown(function () {
                        valite = true;
                        $(document).mousemove(function (e) {
                            var event = e || window.event;
                            
                            if (valite == false) return;
                            
                            currentValue = event.clientX - $('#scrollBar').offset().left ;
                            
                            $("#scroll_Thumb").css("margin-left", currentValue + "px");
                            $("#scroll_Track").css("width", currentValue + 2 + "px");
                            //超出限制
                            if ((currentValue + 25) >= $("#scrollBar").width()) {
                                $("#scroll_Thumb").css("margin-left", $("#scrollBar").width() - 25 + "px");
                                $("#scroll_Track").css("width", $("#scrollBar").width() + 2 + "px");
                                ScrollBar.value = ScrollBar.maxValue;
                            } else if (currentValue <= 0) {
                                $("#scroll_Thumb").css("margin-left", "0px");
                                $("#scroll_Track").css("width", "0px");
                            } else {
                                ScrollBar.value = parseInt(currentValue*30 / $("#scrollBar").width());
                            }
                            $("#scrollBarTxt").html(ScrollBar.value + "/" + ScrollBar.maxValue);
                        });
                    });
                    $(document).mouseup(function () {
                        
                        $(this).unbind('mousedown');
                        $(this).unbind('mousemove');
                    });
                },
                GetValue: function () {
                    this.currentX = $("#scrollBar").width() * (this.value / this.maxValue);
                }
            }
        </script>
    <style type="text/css">
    body{
        user-select: none;
        -o-user-select: none;
        -ms-user-select: none;
        -moz-user-select: none;
    }
    #Main {
        width: 70%;
        height: 300px;
        margin: 0 auto;
        margin-top: 10px;
    }
    #scrollBar {
        width: 80%;
        height: 10px;
        background-color: #ccc;
        margin: 0 auto;
        margin-top: 50px;
        -webkit-border-radius: 2em;
        -moz-border-radius: 2em;
        border-radius: 2em;
        cursor: pointer;
    }
    #scroll_Track {
        width: 0px;
        height: 10px;
        background-color: #ff4400;
        -webkit-border-radius: 2em;
        -moz-border-radius: 2em;
        border-radius: 2em;
    }
    #scroll_Thumb {
        height: 25px;
        width: 25px;
        background-color: #efefef;
        -webkit-border-radius: 2em;
        -moz-border-radius: 2em;
        border-radius: 2em;
        border: 1px solid #ccc;
        -webkit-box-shadow: 0px 0px 5px #ccc;
        -moz-box-shadow: 0px 0px 5px #ccc;
        box-shadow: 0px 0px 5px #ccc;
        position: absolute;
        margin-top: -18px;
        cursor: pointer;
    }
    #scroll_Thumb:hover {
        background-color: #ff4400;
        border: 1px solid #fff;
    }
    .progressTime {
                filter: alpha(opacity=50);
                -moz-opacity: 0.5;
                -khtml-opacity: 0.5;
                opacity: 0.5;
                position: absolute;
                _position: fixed;
                left: 25%;
                top:25%;
                Z-INDEX: 2;
                border: 1px solid gray;
                -moz-border-radius: 5px;
                -webkit-border-radius: 5px;
                border-radius: 5px;
                color: white;
                background: #000;
                width: 660px;
                height:200px;
                padding-top: 0px;
                padding-bottom: 0px;
            }
    </style>
    </head>
    <body>
    
        <div id="Demo" class="progressTime" >
            <div id="Main">
              <div id="scrollBar">
                <div id="scroll_Track"></div>
                <div id="scroll_Thumb"></div>
              </div>
              <p id="scrollBarTxt" style="text-align:center;"></p>
        </div>
    
    </body>
    
    </html>
    View Code

    效果图

    结论

    这段代码只是实现了效果 ,可维护性不是那么高。 但是通过这个无意中解决了一个bug:鼠标抬起解绑mousemove、mousedown事件,然后鼠标抬起还是会拖动。不知道怎么解决,我给body加了一个user-select:none;之后这个bug没了!

  • 相关阅读:
    jQuery对象和DOM对象
    虚拟主机的部署(Apache)
    事件流:事件冒泡和事件捕获
    ThinkPHP
    级联下拉列表
    今日份抽自己!!!
    c++中关于输入字符数组的一些问题
    今日新知(关于递归中变量的声明)
    格子游戏(并查集)
    1.3-14大象喝水
  • 原文地址:https://www.cnblogs.com/imelemon/p/6490355.html
Copyright © 2020-2023  润新知